This is to do with large ships docking, many ships at the same time entering a station boundry box and active turrets at a large player base station.
I have spoken with Lancake about this prior to reporting it here.
Example 1)
Player has 500m ship with 15+ turrets (deactivated) and goes to dock at their station. When the ship nears the station and enters the stations boundry box the client fps drop very low maybe 3-5 fps until the ship has docked then it returns to normal.
Example 2)
NPC pirates spawn (15+) near a player station and the station turrets are active fps drops, when the pirate NPC's enter the stations boundry box the server PING goes crazy 1000+ and is reported by other players and the clients fps dropped to 1. It was necessary to admin mass depawn MOBS to stop the server locking up.
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(Also to add when turrets are activated when in the stations buildmode all turrets including those on docked ships will attempt to fire and cause fps drop and a slight server PINg increase to 200- 400 approx.)
I could be wrong but docked ships turrets look like they are struggling to line up on the NPC's, would it not be better to not have the station control turrets on docked ships?)